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Document Type and Number:
Japanese Patent JPS5687800
Kind Code:
U
Abstract:
A sensing coil unit for a hearing aid is made up of a sensing coil which is in the form of a cylinder one end of which is heavier than the other end and is floated in the liquid in a sealed container, so that the sensing coil is vertical at all times irrespective of the positions of the hearing aid thereby to maintain constant its magnetic coupling condition with the inductance coil which is laid to transmit voice signals to the sensing coil.

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Application Number:
JP17134679U
Publication Date:
July 14, 1981
Filing Date:
December 11, 1979
Export Citation:
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International Classes:
H04B5/00; H04R25/00; H04R27/02; (IPC1-7): H04R25/00; H04B5/00



 
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